The widespread adoption of credit and debit cards means, for many people, the cashless society is already a reality. However, this means the simple system of checking how much cash you’ve got in your wallet before making a purchase is no longer an accurate reflection of your finances, making it all too easy to succumb to temptation and overextend yourself financially. The Proverbial Wallet project at MIT is looking at “un-abstracting virtual assets” with wallets that provide tactile feedback that reflects a person’s current financial state.